Cellular phone with integrated FM radio and remote low noise amplifier

ABSTRACT

A remote device comprises a frequency modulated (FM) tuner that communicates with an antenna and that tunes an FM frequency. A wireless transceiver transmits wireless signals to a remote cellular phone based on FM signals received at the FM frequency.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. Ser. No. 11/704,885, filedFeb. 9, 2007, which application claims the benefit of U.S. ProvisionalApplication No. 60/785,116, filed on Mar. 23, 2006. The disclosures ofthe above applications are incorporated herein by reference in theirentirety.

FIELD

The present disclosure relates to cellular phones, and more particularlyto cellular phones with integrated FM radio receivers.

BACKGROUND

Consumers increasing want to purchase smaller cellular phones. At thesame time, consumers also expect their cellular phones to have increasedfunctionality. These two trends may pose problems for cellular phonemanufacturers since the demand for increased functionality tends toincrease the size of the cellular phones.

Cellular phones may include MP3 players, personal digital assistants(PDAs), WiFi or other network interfaces, cameras, Bluetooth interfacesand/or other devices. Some new cell phones also incorporate FM radioreceivers to allow users to receive analog and/or digital FM broadcasts.

Multi-function cellular phones usually require multiple antennas forreceiving analog cellular signals, digital cellular signals, Bluetoothsignals, WiFi signals and/or other types of wireless signals. If thecellular phone has an FM receiver, another antenna having suitabledimensions is required to allow reception of the FM signals. Because ofthe compact dimensions of cellular phones, it is not feasible tointegrate a suitable FM antenna within the form factor of the cellularphone. Rather, antennas having larger dimensions are typically requiredand are externally connected to the cellular phone. For example, theantenna may be combined with and/or run adjacent to wires that connectthe FM receiver to earphones such as earbuds.

There are multiple ways of implementing an FM receiver. For purposes ofillustration, simplified block diagrams of super-heterodyne and directconversion transmitter and receiver architectures will be discussed,although other architectures may be used. Referring now to FIG. 1A, anexemplary super-heterodyne receiver 14-1 is shown. The receiver 14-1includes an antenna 19 that is coupled to an optional RF filter 20 and alow noise amplifier 22. An output of the amplifier 22 is coupled to afirst input of a mixer 24. A second input of the mixer 24 is connectedto an oscillator 25, which provides a reference frequency. The mixer 24converts radio frequency (RF) signals to intermediate frequency (IF)signals.

An output of the mixer 24 is connected to an optional IF filter 26,which has an output that is coupled to an automatic gain controlamplifier (AGCA) 32. An output of the AGCA 32 is coupled to first inputsof mixers 40 and 41. A second input of the mixer 41 is coupled to anoscillator 42, which provides a reference frequency. A second input ofthe mixer 40 is connected to the oscillator 42 through a −90° phaseshifter 43.

The mixers 40 and 41 convert the IF signals to baseband (BB) signals.Outputs of the mixers 40 and 41 are coupled to BB circuits 44-1 and44-2, respectively. The BB circuits 44-1 and 44-2 may include low passfilters (LPF) 45-1 and 45-2 and gain blocks 46-1 and 46-2, respectively,although other BB circuits may be used. Mixer 40 generates an in-phase(I) signal, which is output to a BB processor 47. The mixer 41 generatesa quadrature-phase (Q) signal, which is output to the BB processor 47.

Referring now to FIG. 1B, an exemplary direct conversion receiver 14-2is shown. The receiver 14-2 includes the antenna 19 that is coupled tothe optional RF filter 20 and to the low noise amplifier 22. An outputof the low noise amplifier 22 is coupled to first inputs of RF to BBmixers 48 and 50. A second input of the mixer 50 is connected tooscillator 51, which provides a reference frequency. A second input ofthe mixer 48 is connected to the oscillator 51 through a −90° phaseshifter 52. The mixer 48 outputs the I-signal to the BB circuit 44-1,which may include the LPF 45-1 and the gain block 46-1. An output of theBB circuit 44-1 is input to the BB processor 47. Similarly, the mixer 50outputs the Q signal to the BB circuit 44-2, which may include the LPF45-2 and the gain block 46-2. An output of the BB circuit 44-2 is outputto the BB processor 47.

SUMMARY

In one feature of the present disclosure, a cellular phone is providedthat includes a first wireless transceiver that receives intermediatefrequency (IF) signals. The IF signals are based on frequency modulated(FM) signals that have been tuned and down-converted from a radiofrequency (RF) to an IF by a remote device. An FM processing modulereceives the IF signals, converts the IF signals to baseband signals,and generates processed FM signals.

In another feature, the cellular phone further includes a cellular phoneprocessing module that performs cellular phone signal processing. One ofthe first wireless transceiver and the FM processing module isintegrated with the cellular phone processing module in an integratedcircuit.

In another feature, the first wireless transceiver transmits theprocessed FM signals to the remote device.

In yet another feature, the cellular phone further includes a userinterface that generates FM station selection data. The first wirelesstransceiver transmits the FM station selection data to the remotedevice.

In another feature, a system includes the cellular phone and furtherincludes the remote device. The remote device generates an audio signalbased on the processed FM signals.

In still another feature, a system includes the cellular phone andfurther includes the remote device. The remote device further includesan antenna and a tuner. The tuner communicates with the antenna andtunes an RF frequency. In an additional feature, the remote devicefurther includes an amplifier that amplifies RF signals at the RFfrequency. In a further feature, the remote device further includes amixer that mixes the RF signals to generate the IF signals. In anotherfeature, the remote device further comprises a second wirelesstransceiver that transmits the IF signals to the cellular phone. Inanother feature, the remote device includes a user interface thatcommunicates with the tuner to select an FM station.

In another feature, the first wireless transceiver and the FM processingmodule are implemented as an integrated circuit.

In yet another feature, a communication method is provided and includesreceiving intermediate frequency (IF) signals via a first wirelesstransceiver. The IF signals are based on frequency modulated (FM)signals that have been tuned and down-converted from a radio frequency(RF) to an IF by a remote device. The IF signals are received via an FMprocessing module. The FM processing module converts the IF signals tobaseband signals and generates processed FM signals.

In another feature, the communication method includes transmitting theprocessed FM signals to the remote device.

In still another feature, the communication method further includesgenerating FM station selection data and transmitting the FM stationselection data to the remote device.

In an additional feature, the communication method further includesgenerating an audio signal based on the processed FM signals.

In another feature, the communication method further includescommunicating with an antenna via a tuner. An RF frequency is tuned. Inanother feature, the communication method further includes amplifying RFsignals at the RF frequency. In another feature, the communicationmethod further includes mixing the RF signals to generate the IFsignals. In another feature, the communication method includestransmitting the IF signals to a cellular phone.

In another feature, the communication method further includescommunicating with a tuner to select an FM station.

In yet another feature, a cellular phone is provided that includes firstwireless transceiver means for receiving intermediate frequency (IF)signals, which are based on frequency modulated (FM) signals. The FMsignals have been tuned and down-converted from a radio frequency (RF)to an IF by a remote device. FM processing means is included forreceiving the IF signals, converts the IF signals to baseband signals,and generates processed FM signals.

In another feature, the cellular phone further includes a cellular phoneprocessing means for performing cellular phone signal processing, atleast one of the first wireless transceiver means and the FM processingmeans is integrated with the cellular phone processing means in anintegrated circuit.

In a further feature, the first wireless transceiver means transmits theprocessed FM signals to the remote device.

In another feature, the cellular phone further includes user interfacemeans for generating FM station selection data, the first wirelesstransceiver means transmits the FM station selection data to the remotedevice.

In another feature, a system includes the cellular phone and furtherincludes the remote device, the remote means generates an audio signalbased on the processed FM signals.

In still another feature, a system includes the cellular phone andfurther includes the remote device. The remote device further includesan antenna, and tuner means for communicating with the antenna andtuning an RF frequency. In another feature, the remote device furtherincludes amplifier means for amplifying RF signals at the RF frequency.In an additional feature, the remote device further includes mixer meansfor mixing the RF signals to generate the IF signals. In anotherfeature, the remote device further includes second wireless transceivermeans for transmitting the IF signals to the cellular phone. In anotherfeature, the remote device includes user interface means forcommunicating with the tuner means to select an FM station.

In another feature, the first wireless transceiver means and the FMprocessing means are implemented as an integrated circuit.

In a further feature, a cellular phone is provided that includes a firstwireless transceiver that receives radio frequency (RF) signals. The RFsignals include frequency modulated (FM) signals that have been tuned bya remote device. An FM processing module receives the RF signals,converts the RF signals to baseband signals, and generates processed FMsignals.

In another feature, the cellular phone further includes a cellular phoneprocessing module that performs cellular phone signal processing. One ormore of the first wireless transceiver and the FM processing module areintegrated with the cellular phone processing module in an integratedcircuit.

In still another feature, the first wireless transceiver transmits theprocessed signals to the remote device.

In another feature, the cellular phone further includes a user interfacethat generates FM station selection data. The first wireless transceivertransmits the FM station selection data to the remote device.

In yet another feature, a system includes the cellular phone and furtherincludes the remote device. The remote device generates an audio signalbased on the processed FM signals.

In another feature, a system includes the cellular phone and furtherincludes the remote device. The remote device further includes anantenna and a tuner that communicates with the antenna and that tunes anRF frequency. In another feature, the remote device further includes anamplifier that amplifies signals at the tuned RF frequency. In anotherfeature, the remote device further includes a second wirelesstransceiver that transmits the IF signals to the cellular phone.

In an additional feature, the first wireless transceiver and the FMprocessing module are implemented as an integrated circuit.

In another feature, the FM processing module includes an intermediatefrequency (IF) mixer that converts the RF signals to IF signals. A BBmixer converts the IF signals to BB signals.

In yet another feature, a communication method is provided that includesreceiving radio frequency (RF) signals. The RF signals include frequencymodulated (FM) signals that have been tuned by a remote device via afirst wireless transceiver. The RF signals are received. The RF signalsare converted to baseband signals. Processed FM signals are generatedvia an FM processing module.

In yet another feature, the communication method further includestransmitting the processed signals to the remote device. In anotherfeature, the communication method further includes generating andtransmitting FM station selection data to the remote device.

In another feature, the communication method further includes generatingan audio signal based on the processed FM signals. In another feature,the communication method further includes communicating with an antennaand tuning an RF frequency. In still another feature, the communicationmethod further includes amplifying signals at the tuned RF frequency. Inanother feature, the communication method further includes transmittingthe IF signals to the cellular phone.

In an additional feature, the communication method further includesconverting the RF signals to IF signals. The IF signals are converted toBB signals.

In another feature, a cellular phone is provided and includes firstwireless transceiver means for receiving radio frequency (RF) signals.The RF signals include frequency modulated (FM) signals that have beentuned by a remote device. FM processing means for receiving the RFsignals is included. The FM processing means converts the RF signals tobaseband signals and generates processed FM signals.

In a further feature, the cellular phone further includes cellular phoneprocessing means for performing cellular phone signal processing. One ormore of the first wireless transceiver means and the FM processing meansare integrated with the cellular phone processing means in an integratedcircuit.

In another feature, the first wireless transceiver means transmits theprocessed signals to the remote device.

In yet another feature, the cellular phone further includes userinterface means for generating FM station selection data. The firstwireless transceiver means transmits the FM station selection data tothe remote device.

In another feature, a system includes the cellular phone and furtherincludes the remote device. The remote device generates an audio signalbased on the processed FM signals.

In still another feature, a system includes the cellular phone andfurther includes the remote device. The remote device further includesantenna means and tuner means for communicating with the antenna meansand for tuning an RF frequency. In another feature, the remote devicefurther includes an amplifier means for amplifying signals at the tunedRF frequency. In another feature, the remote device further includes asecond wireless transceiver means that transmits the IF signals to thecellular phone.

In another feature, the first wireless transceiver means and the FMprocessing means are implemented as an integrated circuit.

In a further feature, the FM processing means includes intermediatefrequency (IF) mixer means for converting the RF signals to IF signals.BB mixer means for converting the IF signals to BB signals is alsoincluded.

In another feature, a cellular phone is provided and includes a firstwireless transceiver that receives baseband (BB) signals. The BB signalsare based on frequency modulated (FM) signals that have been tuned anddown-converted from a radio frequency (RF) to the BB by a remote device.An FM processing module receives the BB signals and generates processedFM signals based on the BB signals.

In still another feature, the cellular phone further includes a cellularphone processing module that performs cellular phone signal processing.One or more of the first wireless transceiver and the FM processingmodule are integrated with the cellular phone processing module in anintegrated circuit.

In another feature, the first wireless transceiver transmits theprocessed FM signals to the remote device.

In yet another feature, the cellular phone further includes a userinterface that generates FM station selection data. The first wirelesstransceiver transmits the FM station selection data to the remotedevice.

In another feature, a system includes the cellular phone and furtherincludes the remote device. The remote device further generates an audiosignal based on the processed FM signals.

In an additional feature, a system includes the cellular phone andfurther includes the remote device. The remote device further includesan antenna and a tuner that communicates with the antenna and that tunesan RF frequency. In another feature, the remote device further includesan amplifier that amplifies RF signals at the tuned RF frequency. Inanother feature, the remote device further includes an intermediatefrequency (IF) mixer that mixes the RF signals to IF signals. In yetanother feature, the remote device further includes a BB mixer thatmixes the IF signals to BB signals. In another feature, the remotedevice further includes a second wireless transceiver that transmits theBB signals to the cellular phone.

In another feature, the first wireless transceiver and the FM processingmodule is implemented as an integrated circuit.

In a further feature, a communication method is provided and includesreceiving baseband (BB) signals, which are based on frequency modulated(FM) signals that have been tuned and down-converted from a radiofrequency (RF) to the BB by a remote device via a first wirelesstransceiver. The BB signals are received via an FM processing module.Processed FM signals are generated based on the BB signals.

In another feature, the communication method further includestransmitting the processed FM signals to the remote device.

In still another feature, the communication method further includesgenerating FM station selection data and transmitting the FM stationselection data to the remote device.

In another feature, the communication method further includes generatingan audio signal based on the processed FM signals.

In an additional feature, the communication method further includescommunicating with an antenna via a tuner and tunings an RF frequency.In another feature, the communication method further includes amplifyingRF signals at the tuned RF frequency. In yet another feature, thecommunication method further includes mixing the RF signals to generateIF signals. In another feature, the communication method furtherincludes mixing the IF signals to generate BB signals. In anotherfeature, the communication method further includes transmitting the BBsignals to a cellular phone.

In still another feature, a cellular phone is provided and includesfirst wireless transceiver means for receiving baseband (BB) signals.The BB signals are based on frequency modulated (FM) signals that havebeen tuned and down-converted from a radio frequency (RF) to the BB by aremote device. FM processing means for receiving the BB signals is alsoincluded. The FM processing means generates processed FM signals basedon the BB signals.

In another feature, the cellular phone further includes cellular phoneprocessing means for performing cellular phone signal processing. One ormore of the first wireless transceiver means and the FM processing meansis integrated with the cellular phone processing means in an integratedcircuit.

In a further feature, the first wireless transceiver means transmits theprocessed FM signals to the remote device.

In another feature, the cellular phone further includes user interfacemeans for generating FM station selection data. The first wirelesstransceiver means transmits the FM station selection data to the remotedevice.

In still another feature, a system includes the cellular phone andfurther includes the remote device. The remote device further generatesan audio signal based on the processed FM signals.

In another feature, a system includes the cellular phone and furtherincludes the remote device. The remote device further includes anantenna and tuner means for communicating with the antenna and fortuning an RF frequency. In another feature, the remote device furtherincludes amplifier means for amplifying RF signals at the tuned RFfrequency. In a further feature, the remote device further includesintermediate frequency (IF) mixer means for mixing the RF signals togenerate IF signals. In another feature, the remote device furtherincludes a BB mixer means for mixing the IF signals to generate BBsignals. In yet another feature, the remote device further includes asecond wireless transceiver means for transmitting the BB signals to thecellular phone.

In another feature, the first wireless transceiver means and the FMprocessing means are implemented as an integrated circuit.

In still another feature, a remote device is provided and includes afrequency modulated (FM) tuner that communicates with an antenna andthat tunes an FM frequency. A wireless transceiver transmits wirelesssignals to a remote cellular phone based on FM signals received at theFM frequency.

In another feature, the first wireless transceiver receives FM tuningdata from the remote cellular phone and adjusts the FM tuner based onthe FM tuning data.

In another feature, the remote device further includes a first antennathat communicates with the FM tuner and receives the RF signals. Asecond antenna communicates with the first wireless transceiver andtransmits the wireless signals.

In an additional feature, the first wireless transceiver includes aBluetooth interface.

In another feature, the remote device further includes an amplifier thatamplifies signals at the tuned RF frequency. A mixer mixes the signalsto the IF signals. The first wireless transceiver transmits the IFsignals to the remote cellular phone and receives processed FM signalsfrom the remote cellular phone. An amplifier generates amplified audiosignals based on the processed FM signals.

In a further feature, a headset includes the remote device and furtherincludes speakers that output the amplified audio signals. In anotherfeature, the headset further includes a conductor that connects theremote device to the speakers. The antenna extends adjacent to theconductor.

In another feature, an article of clothing includes the remote deviceand further includes a speaker that outputs the amplified audio signals.In another feature, a system includes the remote device and furtherincludes speakers that output the amplified audio signals. In anotherfeature, the system further includes a conductor that connects theremote device to the speakers. The antenna extends adjacent to theconductor.

In yet another feature, the remote device further includes a firstamplifier that amplifies RF signals at the tuned RF frequency. Anintermediate frequency (IF) mixer mixes the RF signals to IF signals. ABB mixer mixes the IF signals to BB signals. The wireless transceivertransmits the BB signals to the remote cellular phone and receivesprocessed FM signals from the remote cellular phone. A second amplifiergenerates amplified audio signals based on the processed FM signals.

In another feature, a headset includes the remote device and furtherincludes speakers that output the amplified audio signals. In anotherfeature, the headset further includes a conductor that connects theremote device to the speakers, wherein the antenna extends adjacent tothe conductor.

In still another feature, an article of clothing includes the remotedevice and further includes a speaker that outputs the amplified audiosignals.

In another feature, a system includes the remote device of claim 6 andfurther includes earbuds that output the amplified audio signals. Inanother feature, the system further includes a conductor that connectsthe remote device to the earbuds. The antenna extends adjacent to theconductor.

In another feature, the remote device further includes a tuner thattunes an RF frequency. A first amplifier amplifies signals at the tunedRF frequency. The wireless transceiver transmits the RF signals to theremote cellular phone and receives processed FM signals from the remotecellular phone. A second amplifier generates amplified audio signalsbased on the processed FM signals.

In yet another feature, a headset includes the remote device furtherincludes speakers that output the amplified audio signals. In anotherfeature, the headset further includes a conductor that connects theremote device to the speakers. The antenna extends adjacent to theconductor.

In another feature, an article of clothing includes the remote deviceand further includes a speaker that outputs the amplified audio signals.In another feature, a system includes the remote device and furtherincludes earbuds that output the amplified audio signals. In anotherfeature, the system further includes a conductor that connects theremote device to the earbuds. The antenna extends adjacent to theconductor.

In another feature, a communication method is provided and includescommunicating with an antenna and tuning an FM frequency via a frequencymodulated (FM) tuner. Wireless signals are transmitted to a remotecellular phone based on FM signals received at the FM frequency via awireless transceiver.

In another feature, the communication method includes receiving FMtuning data from the remote cellular phone and adjusting the FM tunerbased on the FM tuning data.

In still another feature, the communication method further includescommunicating with the FM tuner and receiving the RF signals via a firstantenna. The first wireless transceiver is communicated with and thewireless signals are transmitted via a second antenna.

In another feature, the communication method further includes amplifyingsignals at the tuned RF frequency. The amplified signals are mixed togenerate the IF signals. The IF signals are transmitted to the remotecellular phone. Processed FM signals are received from the remotecellular phone. The amplified audio signals are generated based on theprocessed FM signals.

In a further feature, the communication method further includesamplifying RF signals at the tuned RF frequency. The RF signals aremixed to generate IF signals. The IF signals are mixed to generate BBsignals. The BB signals are transmitted to the remote cellular phone.Processed FM signals are received from the remote cellular phone.Amplified audio signals are generated based on the processed FM signals.

In another feature, the communication method further includes tuning anRF frequency. Amplifying signals are tuned at the RF frequency. The RFsignals are transmitted to the remote cellular phone. Processed FMsignals are received from the remote cellular phone. Amplified audiosignals are generated based on the processed FM signals.

In another feature, the communication method further includes outputtingthe amplified audio signals. In another feature, the communicationmethod further includes outputting the amplified audio signals. Inanother feature, the communication method further includes outputtingthe amplified audio signals.

In an additional feature, a remote device is provided and includesfrequency modulated (FM) tuner means for communicating with an antennaand for tuning an FM frequency. Wireless transceiver means fortransmitting wireless signals to a remote cellular phone based on FMsignals received at the FM frequency is also included.

In another feature, the first wireless transceiver means receives FMtuning data from the remote cellular phone and adjusts the FM tunerbased on the FM tuning data.

In another feature, the remote device further includes first antennameans for communicating with the FM tuner and receiving the RF signals.Second antenna means for communicating with the first wirelesstransceiver means and transmitting the wireless signals is included.

In another feature, the first wireless transceiver means includes aBluetooth interface means.

In yet another feature, the remote device further includes amplifiermeans for amplifying signals at the tuned RF frequency. Mixer means formixing the signals to generate the IF signals. First wirelesstransceiver means for transmitting the IF signals to the remote cellularphone and for receiving processed FM signals from the remote cellularphone is included. Amplifier means for generating amplified audiosignals based on the processed FM signals is also included.

In another feature, a headset includes the remote device and furtherincludes audio means for outputting the amplified audio signals. Inanother feature, the headset further includes a conductor means forconnecting the remote means to the audio means. The antenna extendsadjacent to the conductor means.

In still another feature, an article of clothing includes the remotedevice and further includes audio means for outputting the amplifiedaudio signals. In another feature, a system includes the remote deviceand further includes audio means for outputting the amplified audiosignals. In another feature, the system further includes conductor meansfor connecting the remote means to the audio means. The antenna extendsadjacent to the conductor means.

In another feature, the remote device further includes first amplifiermeans for amplifying RF signals at the tuned RF frequency. Intermediatefrequency (IF) mixer means for mixing the RF signals to generate IFsignals is included. BB mixer means for mixing the IF signals togenerate BB signals is also included. The wireless transceiver meanstransmits the BB signals to the remote cellular phone and receivesprocessed FM signals from the remote cellular phone. Second amplifiermeans for generating amplified audio signals based on the processed FMsignals is further included.

In another feature, a headset includes the remote device and furtherincludes audio means for outputting the amplified audio signals. Inanother feature, the headset further includes conductor means forconnecting the remote means to the audio means. The antenna extendsadjacent to the conductor means.

In a further feature, an article of clothing includes the remote meansand further includes audio means for outputting the amplified audiosignals. In another feature, a system includes the remote means andfurther includes audio means for outputting the amplified audio signals.In another feature, the system further includes conductor means forconnecting the remote means to the audio means. The antenna extendsadjacent to the conductor means.

In another feature, the remote device further includes tuner means fortuning an RF frequency. First amplifier means for amplifying signals atthe tuned RF frequency is included. The wireless transceiver meanstransmits the RF signals to the remote cellular phone and receivesprocessed FM signals from the remote cellular phone. Second amplifiermeans for generating amplified audio signals based on the processed FMsignals is further included.

In another feature, a headset includes the remote device and furtherincludes audio means for outputting the amplified audio signals. Inanother feature, the headset further includes conductor means forconnecting the remote device to the audio means. The antenna extendsadjacent to the conductor means.

In an additional feature, an article of clothing includes the remotedevice and further includes audio means for outputting the amplifiedaudio signals. In another feature, a system includes the remote deviceand further includes audio means for outputting the amplified audiosignals. In another feature, the system further includes conductor meansfor connecting the remote device to the audio means. The antenna extendsadjacent to the conductor means.

In still other features, the systems and methods described above areimplemented by a computer program executed by one or more processors.The computer program can reside on a computer readable medium such asbut not limited to memory, non-volatile data storage and/or othersuitable tangible storage mediums.

Further areas of applicability of the present disclosure will becomeapparent from the detailed description provided hereinafter. It shouldbe understood that the detailed description and specific examples, whileindicating the preferred embodiment of the disclosure, are intended forpurposes of illustration only and are not intended to limit the scope ofthe disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure will become more fully understood from thedetailed description and the accompanying drawings, wherein:

FIG. 1A is a functional block diagram of an exemplary FM receiveraccording to the prior art;

FIG. 1B is a functional block diagram of a second exemplary FM receiveraccording to the prior art;

FIG. 2 is a functional block diagram of a cellular phone systemincluding an exemplary remote device and an exemplary cellular phoneaccording to the present disclosure;

FIG. 3A is a functional block diagram of a headset according to thepresent disclosure;

FIG. 3B is a functional block diagram of earbuds according to thepresent disclosure;

FIGS. 4A and 4B illustrate articles of clothing that incorporate theremote device according to the present disclosure;

FIG. 5 is a more detailed functional block diagram of the cellular phonesystem of FIG. 2;

FIG. 6 is a functional block diagram of an alternate cellular phonesystem;

FIG. 7 is a functional block diagram of another alternate cellular phonesystem; and

FIG. 8 is a logic flow diagram illustrating a method of operating acellular phone system.

DETAILED DESCRIPTION

The following description is merely exemplary in nature and is in no wayintended to limit the disclosure, its application, or uses. For purposesof clarity, the same reference numbers will be used in the drawings toidentify similar elements. As used herein, the term module refers to anApplication Specific Integrated Circuit (ASIC), an electronic circuit, aprocessor (shared, dedicated, or group) and memory that execute one ormore software or firmware programs, a combinational logic circuit,and/or other suitable components that provide the describedfunctionality. As used herein, the phrase at least one of A, B, and Cshould be construed to mean a logical (A or B or C), using anon-exclusive logical or. It should be understood that steps within amethod may be executed sequentially, simultaneously or in differentorder without altering the principles of the present disclosure.

A cellular phone FM receiver typically has multiple associatedcomponents, such as tuners, low noise amplifiers (LNAs), oscillators,amplifiers, filters, converters, etc. The cellular phone systemaccording to the present invention separates one or more of suchcomponents from a cellular phone. As a result, a potion of the FM signalprocessing is performed remotely from the cellular phone. The cellularphone continues and completes the FM signal processing as described infurther detail below.

Referring now to FIG. 2, a cellular phone system 100 is shown andincludes a remote device 110 and a cellular phone 120. The cellularphone system 100, the remote device 110, and the cellular phone 120 areshown as and each considered a cellular phone circuit. The remote device110 includes a tuning module 124 that tunes to one or more selectedfrequencies, such as one or more FM radio stations. The tuning module124 communicates with one or more FM antennas 126 that receive FMsignals as input signals. A low noise amplifier (LNA) module 128amplifies the selected FM signals and outputs amplified signals to ananalog to digital (A/D) converter module 130. The A/D converter 130outputs digital signals to a wireless interface module 132 of the remotedevice 110. The wireless interface module 132 transmits wireless signalsto the cellular phone 120 via an antenna 133. One or more components ofthe remote device 110 can be integrated into a system on a chip (SOC).

The user may select a particular FM station using inputs on the cellularphone 120 and/or on the remote device 110. If the user employs inputs ofthe cellular phone 120 to select an FM station, the wireless interface132 also may receive tuning data such as frequency data from thecellular phone 120, which is output to the tuner 124. Alternately, theremote device 110 may include a user input 136 that allows a user toselect a station, adjust volume, and/or perform other radio-basedfunctions such as selecting preset stations, setting preset stations,scanning, etc. The user input of the cellular phone 120 may also allowthe user to adjust volume, and/or perform other radio-based functionssuch as selecting preset stations, setting preset stations, scanning,etc.

The wireless interface 132 also receives the processed FM radio signalfrom the cellular phone 120. The received signal is output to a digitalto analog (D/A) converter 142, which outputs analog audio signals. TheD/A converter 142 outputs the audio signal to an amplifier 144, whichamplifies the audio signal and outputs the signal to an output 146, suchas an output jack, speakers, etc.

An exemplary embodiment of the cellular phone 120 is shown in FIG. 2.Still other types of cellular phones may be used. The cellular phone 120includes a modified FM receiver or FM processing module 200, whichcommunicates with a wireless interface module 168 of the cellular phone120. The FM module 200 continues processing of the FM signals as will bedescribed further below. When the processing is completed, the FM module200 outputs the processed FM signals to the signal processing and/orcontrol module 152 and/or to the wireless interface module 168. From thecontrol module 152, the processed FM signals may be sent to the wirelessinterface 168 and/or to an audio out 158. The wireless interface module168, in turn, transmits the wireless signals to the wireless interfacemodule 132 via an antenna 167. The remote device 110 receives thewireless signals and outputs the signals as described above.

The cellular phone 120 in addition to the audio output 158, which may bea speaker and/or audio output jack, may include a microphone 156, adisplay 160 and/or an input device 162 such as a keypad, pointingdevice, voice actuation and/or other input device. The control module152 and/or other circuits (not shown) in the cellular phone 120 mayprocess data, perform coding and/or encryption, perform calculations,format data and/or perform other cellular phone functions. The cellularphone in addition to the antenna 167 may have a cellular designatedantenna 170.

The cellular phone 120 may communicate with mass data storage 164 thatstores data in a nonvolatile manner such as optical and/or magneticstorage devices for example hard disk drives HDD. The HDD may be a miniHDD that includes one or more platters having a diameter that is smallerthan approximately 1.8″.

The cellular phone 120 may be connected to memory 166 such as RAM, ROM,low latency nonvolatile memory such as flash memory and/or othersuitable electronic data storage. The cellular phone 120 also maysupport connections with a WLAN via the wireless interface 168 and/orvia an additional wireless interface (not shown). The wirelessinterfaces may be compliant with one or more of the following IEEEstandards 802.11, 802.11a, 802.11b, 802.11g, 802.11h, 802.11n, 802.16,802.20, and/or Bluetooth. The control module 152 may be integrated withthe FM module 200, the memory 166 into a system on-chip (SOC).

Referring now to FIG. 3A, the remote device 110 may be packaged with aheadset 220, that includes first and second housings 224 and 226. Thefirst and second housings 224 and 226 enclose speakers 230 and 232,respectively. The remote device 110 may be packaged with the firstand/or second housings 224 and 226. The housings 224 and 226 may beconnected by a “C”-shaped portion 230, which supports the headset 220 ona user's head. The antenna 126 may be routed through the “C”-shapedportion 230. The housings 224 and/or 226 may also house batteries 240,which power the remote device 110.

Referring now to FIG. 3B, the remote device 110 may be integrated with aheadset 250, which is shown to include first and second earbuds 244 and246, respectively. The first and second earbuds 244 and 246 includespeakers 230 and 232, respectively. The earbuds 244 and 246 may includea device (not shown) that physically attaches to attach the earbuds 244and 246 to the user's ears. The remote device 110 may be integrated withone or both of the earbuds 244 and/or 246. The earbuds 244 and 246 maybe connected by wire 260. The antenna 126 may be integrated with and/orrouted adjacent to the wire 260. The earbuds 244 and/or 246 may alsohouse batteries 240, which power the remote device 110.

Referring now to FIGS. 4A and 4B, the remote device 110 may be attachedto and/or inserted in an article of clothing 260. In FIG. 4A, thearticle of clothing 260 also includes a speaker 270 and a battery 272.In FIG. 4B, the earbuds 244 and 246 are connected by wire 260 to theremote device 110 via an output jack thereof. The antenna 126 may belocated adjacent to the wire 260. Still other variations arecontemplated.

Referring now to FIGS. 5-7, several variations relating to the relativearrangement and location of FM receiver components associated with theremote device 110 and/or the cellular phone 120 are shown. In FIG. 5, amore detailed drawing of the remote device 110 of FIG. 2 is shown. TheLNA is located in the remote device 110. In FIG. 6, an intermediatefrequency (IF) mixer is also located in the remote device 110 inaddition to the LNA. In FIG. 7, the IF mixer and a baseband (BB) mixerare located in the remote device 110 in addition to the LNA.

In FIG. 5, the antenna 126 receives a RF signal including FM signals.The LNA 128 amplifies the signals and outputs the signals to the A/Dconverter 130. Optional filters 300 may be used at the input and/oroutput of the LNA 128. The digital signal output by the A/D converter130 is output to the wireless network interface 132, which transmits thedigital signal to the wireless network interface 168. The wirelessnetwork interface 168 outputs the signal to intermediate frequency (IF)mixers 304-1 and 304-2, which also receive a reference signal outputsfrom an oscillator 308. Intermediate signal outputs of the IF mixers304-1 and 304-2 are optionally filtered by filters 310 and 312 and inputto BB mixers 312-1 and 312-2, respectively. The BB mixers 312-1 and312-2 also receive reference signal outputs from an oscillator 316.Baseband signal outputs of the BB mixers 312-1 and 312-2 are optionallyfiltered by filters 320 and 322 and input to a signal processor 330,which processes the baseband FM signals.

The processed FM signals are output by the signal processor 330 to thewireless network interface 168. The wireless network interface 168transmits the processed signal to the wireless network interface 132.The wireless network interface 132 outputs the received processed signalto a digital to analog (D/A) converter 142. The D/A converter 142outputs the analog signals to an amplifier 144 as described above.

In FIG. 6, an analog IF mixer 400 is integrated with the remote device110. The mixer 400 includes first and second mixers 410-1 and 410-2. Ananalog oscillator 414 outputs oscillator signals to the mixers 410-1 and410-2. Outputs of the mixers 410-1 and 410-2 are optionally filtered byfilters 414 and 416, respectively and output to the A/D converter 130.

In FIG. 7, the analog IF mixer 400 is integrated with the remote device110. In addition, an analog BB mixer 430 is integrated with the remotedevice 110. The mixer 430 includes first and second mixers 432-1 and432-2. An analog oscillator 434 outputs oscillator signals to the mixers432-1 and 432-2. Outputs of the mixers 432-1 and 432-2 are optionallyfiltered (not shown) and output to the A/D converter 130. As can beappreciated, one or both of the mixers 400, 430 can be implemented inthe digital domain by adjusting the location of the A/D converter 130 inthe remote device 110.

Referring to FIG. 8, a logic flow diagram illustrating a method ofoperating a cellular phone system is shown. Although the following stepsare primarily described with respect to the embodiment of FIG. 2, thesteps may be easily modified to encompass other embodiments of thepresent invention, some of which are described above.

In step 500, a remote device receives FM station data. The FM stationdata may be received from a user input of the remote device or may bewirelessly received from a cellular phone using wireless interfaces,such as the interfaces 132, 168. In step 502, a tuner of the remotedevice tunes to a FM station based on the FM station data. In step 504,FM radio signals are received via a first antenna, such as the antenna126. In step 506, the FM signals are amplified to generate amplifiedsignals. The FM signals may be amplified by a LNA, such the LNA 128.

In step 508, the amplified signals are converted into digital signals orpreprocessed FM signals. The amplified signals may be converter using anA/D converter, such as the A/D converter 130. In step 510, thepreprocessed FM signals are wirelessly transmitted as wireless signalsto the cellular phone via a second antenna, such as the antenna 133.

Note that additional steps may be incorporated in between steps 504-510to perform addition FM signal processing as described above and below.For example, additional steps may be incorporated to include thegeneration of intermediate frequency signals and baseband signals, aswell the filtration of such signals.

In step 512, the preprocessed FM signals are received by the cellularphone as input signals via an antenna, such as the antenna 167. In step514, the preprocessed FM signals are passed through a wireless interfaceto a FM processing module, such as the FM processing module 200. In step516, the FM processing module or some other cellular phone processor orcontrol module completes the processing of the originally received FMsignals. The preprocessed FM signals are converted into processed FMsignals.

In step 518, the processed FM signals from step 116 are transmitted tothe remote device for audio output thereof or to an audio output of thecellular phone. Of course, the processed FM signals or data relatedthereto may be stored in a memory of the cellular phone or in a memoryof the remote device.

The above-described method eliminates some of the disadvantages that areassociated with the need for a long FM antenna to be directly connectedto a cellular phone.

Those skilled in the art can now appreciate from the foregoingdescription that the broad teachings of the disclosure can beimplemented in a variety of forms. Therefore, while this disclosureincludes particular examples, the true scope of the disclosure shouldnot be so limited since other modifications will become apparent to theskilled practitioner upon a study of the drawings, the specification andthe following claims.

1. A remote device comprising: a frequency modulated (FM) tuner thatcommunicates with an antenna and that tunes an FM frequency; and awireless transceiver that transmits wireless signals to a remotecellular phone based on FM signals received at said FM frequency.
 2. Theremote device of claim 1 wherein said first wireless transceiverreceives FM tuning data from said remote cellular phone and adjusts saidFM tuner based on said FM tuning data.
 3. The remote device of claim 1further comprising: a first antenna that communicates with said FM tunerand receives said RF signals; and a second antenna that communicateswith said first wireless transceiver and transmits said wirelesssignals.
 4. The remote device of claim 1 wherein said first wirelesstransceiver includes a Bluetooth interface.
 5. The remote device ofclaim 1 further comprising: an amplifier that amplifies signals at saidtuned RF frequency; a mixer that mixes said signals to said IF signals,wherein said first wireless transceiver transmits said IF signals tosaid remote cellular phone and receives processed FM signals from saidremote cellular phone; and an amplifier that generates amplified audiosignals based on said processed FM signals.
 6. The remote device ofclaim 1 further comprising: A first amplifier that amplifies RF signalsat said tuned RF frequency; an intermediate frequency (IF) mixer thatmixes said RF signals to IF signals; a BB mixer that mixes said IFsignals to BB signals, wherein said wireless transceiver transmits saidBB signals to said remote cellular phone and receives processed FMsignals from said remote cellular phone; and a second amplifier thatgenerates amplified audio signals based on said processed FM signals. 7.The remote device of claim 1 further comprising: a tuner that tunes anRF frequency; a first amplifier that amplifies signals at said tuned RFfrequency, wherein said wireless transceiver transmits said RF signalsto said remote cellular phone and receives processed FM signals fromsaid remote cellular phone; and a second amplifier that generatesamplified audio signals based on said processed FM signals.
 8. A headsetcomprising the remote device of claim 5 and further comprising speakersthat output said amplified audio signals.
 9. The headset of claim 8further comprising a conductor that connects said remote device to saidspeakers, wherein said antenna extends adjacent to said conductor.
 10. Aheadset comprising the remote device of claim 6 and further comprisingspeakers that output said amplified audio signals.
 11. The headset ofclaim 10 further comprising a conductor that connects said remote deviceto said speakers, wherein said antenna extends adjacent to saidconductor.
 12. A headset comprising the remote device of claim 7 andfurther comprising speakers that output said amplified audio signals.13. The headset of claim 12 further comprising a conductor that connectssaid remote device to said speakers, wherein said antenna extendsadjacent to said conductor.
 14. An article of clothing comprising theremote device of claim 5 and further comprising a speaker that outputssaid amplified audio signals.
 15. An article of clothing comprising theremote device of claim 6 and further comprising a speaker that outputssaid amplified audio signals.
 16. An article of clothing comprising theremote device of claim 7 and further comprising a speaker that outputssaid amplified audio signals.
 17. A system comprising the remote deviceof claim 5 and further comprising speakers that output said amplifiedaudio signals.
 18. The system of claim 17 further comprising a conductorthat connects said remote device to said speakers, wherein said antennaextends adjacent to said conductor.
 19. A system comprising the remotedevice of claim 6 and further comprising earbuds that output saidamplified audio signals.
 20. The system of claim 19 further comprising aconductor that connects said remote device to said earbuds, wherein saidantenna extends adjacent to said conductor.
 21. A system comprising theremote device of claim 7 and further comprising earbuds that output saidamplified audio signals.
 22. The system of claim 21 further comprising aconductor that connects said remote device to said earbuds, wherein saidantenna extends adjacent to said conductor.
 23. A communication methodcomprising: communicating with an antenna and tuning an FM frequency viaa frequency modulated (FM) tuner; and transmitting wireless signals to aremote cellular phone based on FM signals received at said FM frequencyvia a wireless transceiver.
 24. The communication method of claim 23receiving FM tuning data from said remote cellular phone and adjustingsaid FM tuner based on said FM tuning data.
 25. The communication methodof claim 23 further comprising: communicating with said FM tuner andreceiving said RF signals via a first antenna; and communicating withsaid first wireless transceiver and transmitting said wireless signalsvia a second antenna.
 26. The communication method of claim 23 furthercomprising: amplifying signals at said tuned RF frequency; mixing saidsignals to generate said IF signals; transmitting said IF signals tosaid remote cellular phone and receiving processed FM signals from saidremote cellular phone; and generating amplified audio signals based onsaid processed FM signals.
 27. The communication method of claim 23further comprising: amplifying RF signals at said tuned RF frequency;mixing said RF signals to generate IF signals; mixing said IF signals togenerate BB signals, transmitting said BB signals to said remotecellular phone and receiving processed FM signals from said remotecellular phone; and generating amplified audio signals based on saidprocessed FM signals.
 28. The communication method of claim 23 furthercomprising: tuning an RF frequency; amplifying signals at said tuned RFfrequency, transmitting said RF signals to said remote cellular phoneand receiving processed FM signals from said remote cellular phone; andgenerating amplified audio signals based on said processed FM signals.29. The communication method of claim 27 further comprising outputtingsaid amplified audio signals.
 30. The communication method of claim 28further comprising outputting said amplified audio signals.
 31. Thecommunication method of claim 29 further comprising outputting saidamplified audio signals.